1 """A ScrolledText widget feels like a text widget but also has a 2 vertical scroll bar on its right. (Later, options may be added to 3 add a horizontal bar as well, to make the bars disappear 4 automatically when not needed, to move them to the other side of the 5 window, etc.) 6 7 Configuration options are passed to the Text widget. 8 A Frame widget is inserted between the master and the text, to hold 9 the Scrollbar widget. 10 Most methods calls are inherited from the Text widget; Pack, Grid and 11 Place methods are redirected to the Frame widget however. 12 """ 13 14 __all__ = ['ScrolledText'] 15 16 from Tkinter import Frame, Text, Scrollbar, Pack, Grid, Place 17 from Tkconstants import RIGHT, LEFT, Y, BOTH 18 19 class ScrolledText(Text): 20 def __init__(self, master=None, **kw): 21 self.frame = Frame(master) 22 self.vbar = Scrollbar(self.frame) 23 self.vbar.pack(side=RIGHT, fill=Y) 24 25 kw.update({'yscrollcommand': self.vbar.set}) 26 Text.__init__(self, self.frame, **kw) 27 self.pack(side=LEFT, fill=BOTH, expand=True) 28 self.vbar['command'] = self.yview 29 30 # Copy geometry methods of self.frame without overriding Text 31 # methods -- hack! 32 text_meths = vars(Text).keys() 33 methods = vars(Pack).keys() + vars(Grid).keys() + vars(Place).keys() 34 methods = set(methods).difference(text_meths) 35 36 for m in methods: 37 if m[0] != '_' and m != 'config' and m != 'configure': 38 setattr(self, m, getattr(self.frame, m)) 39 40 def __str__(self): 41 return str(self.frame) 42 43 44 def example(): 45 import __main__ 46 from Tkconstants import END 47 48 stext = ScrolledText(bg='white', height=10) 49 stext.insert(END, __main__.__doc__) 50 stext.pack(fill=BOTH, side=LEFT, expand=True) 51 stext.focus_set() 52 stext.mainloop() 53 54 if __name__ == "__main__": 55 example() 56
